The challenge tested [e.g., password cracking, steganography, or header manipulation] skills.

[If applicable: The file was password protected, requiring a brute-force approach with fcrackzip or finding a hint in the challenge description]. 3. Extraction and Deep Analysis

The investigation concluded that GR1221.zip served as a [container/transporter] for [specific data]. CTF{Example_Flag_GR1221}

The archive structure was inspected to check for password protection or multiple nested files without fully extracting it. Used unzip -l GR1221.zip to list files.

Running strings on the extracted files to find human-readable text, hardcoded keys, or hidden flags.

Before extraction, basic metadata was gathered to establish a baseline and ensure file integrity. GR1221.zip File Type: ZIP archive (MIME type: application/zip )